Characterization of SrFe0.9-xCuxMo0.1O3-δ (x = 0, 0.1 and 0.2) as cathode for intermediate-temperature solid oxide fuel cells

Summary Cu doped perovskites SrFe 0.9- x Cu x Mo 0.1 O 3- δ (SFCM, x = 0-0.2) are explored as cathodes for IT-SOFCs. The influence of Cu doping on the property of SFCM series was studied in detail. The oxygen content decreases with the increase of Cu doping amount. SFCM samples are chemically compatible with LSGM electrolyte. However, the TEC values are still a bit higher than that of some common SOFC electrolytes. At 750°C, the R p values are 0.261, 0.227 and 0.155 Ω·cm 2 for SFCM0, SFCM0.1, and SFCM0.2. The obtained activation energies for x = 0, 0.1, and 0.2 are 1.01, 0.98, and 0.87 eV, respectively. These results indicate that Cu doping into SrFe 0.9- x Cu x Mo 0.1 O 3- δ has a favorable effect on the electrochemical activity of the materials.